Authorities said the pilot, who was identified by officials in New Jersey as Tim McCormack, originally left New Jersey with a passenger around 11:30 a.m. He dropped off the passenger in New York City and stayed until around 1:30 p.m. before departing for Linden, New Jersey, NTSB air safety investigator Doug Brazy said Tuesday at a news conference.

It was not immediately clear why the pilot stayed in the city. Brazy said investigators have determined he reviewed weather reports during that time. Authorities believe the rainy weather Monday might have contributed to the crash.

“That’s something we’re looking into,” Brazy said. “We have much more work to do before this investigation is complete.”

Authorities are also delving into whether McCormack tried to send a radio transmission around the time of the crash and whether his flight path was meant to bring him into Midtown Manhattan.

“As far as we know the pilot was not in communication with (air traffic control), nor was he required to (be),” Brazy said. “He may have ventured into airspace requiring that he contact air traffic control (during the crash).”

Investigations like the one launched Monday typically take between 18 and 24 months, Brazy said.

Authorities continue to investigate.

Update 1:30 p.m. EDT June 11: Officials with the National Transportation Safety Board are holding a news conference scheduled for 1:30 p.m. to provide updates on Monday’s deadly helicopter crash-landing in New York City.

Update 12 p.m. EDT June 11: Officials with the National Transportation Safety Board, the agency heading the investigation into Monday’s crash-landing, are expected to provide an update on the probe at a news conference Tuesday afternoon.

NTSB media briefing Tuesday on the June 10 helicopter crash in New York City @ 1:30 pm (ET), on corner of West 52nd St and 7th Ave, Manhattan.

Update 8:50 pm EDT June 10: The pilot, who was the only one killed in the crash, was identified as Tim McCormack, 58, a former fire chief in upstate New York and a veteran pilot, according to The Associated Press.

The crash occurred 11 minutes after take-off from a heliport along the East River and about a mile away, the AP reported.

McCormack was described as “a highly seasoned” and “well-regarded” pilot by the director of the Linden Municipal Airport, who also speculated that either the weather or a mechanical issue most likely cuased the crash.

Gov. Andrew Cuomo told reporters it appears McCormack made a “forced landing” on the roof of AXA Equitable building in Midtown Manhattan, but it’s unknown at this point what caused it.

Update 5:13 p.m. EDT June 10: The helicopter crash on a skyscraper in New York Monday brought back memories of 9/11 for city residents.

"As soon as you hear an aircraft hit a building, I think my mind goes where every New Yorker's mind goes," Gov. Andrew Cuomo said, according to The Associated Press.

"As soon as you hear an aircraft hit a building, I think my mind goes where every New Yorker's mind goes." A helicopter crash-landed on the roof of a rain-shrouded midtown Manhattan skyscraper Monday, killing the pilot. https://t.co/rW0JNOxHik

People inside the building said they felt it tremble and smelled smoke in the stairwells as they were being evacuated.

Investigators are trying to figure out why the pilot decided to take off in such bad weather. It was raining and foggy at the time of the crash. They also said he did not file a flight plan with LaGuardia Airport, something that’s required to fly over buildings in the city, especially near Trump Tower.

Firefighters were able to quickly douse the flames from the crash and mitigate the fuel spill.

Images from the scene of today’s helicopter crash at 787 7th Ave. in Manhattan. #FDNY members remain on scene. There is one fatality reported. pic.twitter.com/7qyyJWrMsw

Update 4:05 p.m. EDT June 10: The helicopter that crashed Monday in New York City had taken off from the 34th Street heliport about 15 minutes before the crash, authorities said Monday at a news conference.

Officials have tentatively identified the person killed in the crash as the pilot of the private helicopter, though authorities did not immediately release his or her name. New York police Commissioner James O’Neill said authorities believe the helicopter might have been bound for its home airport in Linden, New Jersey, although authorities were still working Monday to confirm the helicopter’s flight path.

Officials with the National Transportation Safety Board are investigating the incident.

Update 3:50 p.m. EDT June 10: New York City Mayor Bill de Blasio said at a news conference Monday that the crash-landing in midtown Manhattan did not appear to be related to terrorism.

Authorities are sharing updates on the preliminary investigation after Monday’s crash.

Update 3:15 p.m. EDT June 10: Officials with the Federal Aviation Administration said they believe the pilot was the only person on board an Agusta A109E helicopter when it made a hard landing Monday afternoon on top of a New York City skyscraper.

Fire officials said the pilot, whose name was not immediately released, died in the incident around 1:45 p.m. Monday.

Officials said the National Transportation Safety Board will handle the investigation. It was not immediately clear why the helicopter crash landed Monday.

Update 2:55 p.m. EDT June 10: President Donald Trump praised first responders Monday after authorities in New York City responded to reports of a helicopter that crash landed on top of a skyscraper in midtown Manhattan.

Trump said he had been briefed on the incident.

“Phenomenal job by our GREAT First Responders who are currently on the scene,” Trump said. “THANK YOU for all you do 24/7/365! The Trump Administration stands ready should you need anything at all.”

I have been briefed on the helicopter crash in New York City. Phenomenal job by our GREAT First Responders who are currently on the scene. THANK YOU for all you do 24/7/365! The Trump Administration stands ready should you need anything at all.